#pragma warning disable 108
using System;
using System.Runtime.InteropServices;
using System.Collections.Generic;
using Cephei;
using Cephei.Generic;
using Cephei.QL.Math;
namespace Cephei.QL.Methods.Finitedifferences
{
     // <summary> 
	// ! The differential operator \f$  D_{+}D_{-} \f$ discretizes the second derivative with the second-order formula \f[ \frac{\partial^2 u_{i}}{\partial x^2} \approx \frac{u_{i+1}-2u_{i}+u_{i-1}}{h^2} = D_{+}D_{-} u_{i} \f]  \ingroup findiff  \test the correctness of the returned values is tested by checking them against numerical calculations.
	// </summary>
    [Guid ("ABA22FE6-9BD0-4976-B1B3-4BF4EE92444C"),ComVisible(true)]
	public interface IDPlusDMinus : Cephei.QL.Methods.Finitedifferences.ITridiagonalOperator
	{
		///////////////////////////////////////////////////////////////
        // Methods
        //
    }

    // <summary> 
	// ! The differential operator \f$  D_{+}D_{-} \f$ discretizes the second derivative with the second-order formula \f[ \frac{\partial^2 u_{i}}{\partial x^2} \approx \frac{u_{i+1}-2u_{i}+u_{i-1}}{h^2} = D_{+}D_{-} u_{i} \f]  \ingroup findiff  \test the correctness of the returned values is tested by checking them against numerical calculations. Factory
	// </summary>
   	[ComVisible(true)]
    public interface IDPlusDMinus_Factory // : Collection_Factory<IDPlusDMinus, ICell<IDPlusDMinus>>
    {
        ///////////////////////////////////////////////////////////////
        // Factory methods
        //
        
	    IDPlusDMinus Create (UInt64 gridPoints, Double h);
    }
}

